91000911 has 8 divisors (see below), whose sum is σ = 121386240. Its totient is φ = 60641432.

The previous prime is 91000867. The next prime is 91000919. The reversal of 91000911 is 11900019.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91000911 - 2¹¹ = 90998863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91000919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4330 + ... + 14168.

It is an arithmetic number, because the mean of its divisors is an integer number (15173280).

Almost surely, 2^91000911 is an apocalyptic number.

91000911 is a deficient number, since it is larger than the sum of its proper divisors (30385329).

91000911 is a wasteful number, since it uses less digits than its factorization.

91000911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12925.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 91000911 is about 9539.4397634243. The cubic root of 91000911 is about 449.7956454839.

The spelling of 91000911 in words is "ninety-one million, nine hundred eleven", and thus it is an aban number.